What’s the difference between vegan and vegetarian?
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What’s the difference? is a new editorial product that explains the similarities and differences between commonly confused health and medical terms, and why they matter.
Vegan and vegetarian diets are plant-based diets. Both include plant foods, such as fruits, vegetables, legumes and whole grains.
But there are important differences, and knowing what you can and can’t eat when it comes to a vegan and vegetarian diet can be confusing.
So, what’s the main difference?
What’s a vegan diet?
A vegan diet is an entirely plant-based diet. It doesn’t include any meat and animal products. So, no meat, poultry, fish, seafood, eggs, dairy or honey.
What’s a vegetarian diet?
A vegetarian diet is a plant-based diet that generally excludes meat, poultry, fish and seafood, but can include animal products. So, unlike a vegan diet, a vegetarian diet can include eggs, dairy and honey.
But you may be wondering why you’ve heard of vegetarians who eat fish, vegetarians who don’t eat eggs, vegetarians who don’t eat dairy, and even vegetarians who eat some meat. Well, it’s because there are variations on a vegetarian diet:
- a lacto-ovo vegetarian diet excludes meat, poultry, fish and seafood, but includes eggs, dairy and honey
- an ovo-vegetarian diet excludes meat, poultry, fish, seafood and dairy, but includes eggs and honey
- a lacto-vegetarian diet excludes meat, poultry, fish, seafood and eggs, but includes dairy and honey
- a pescatarian diet excludes meat and poultry, but includes eggs, dairy, honey, fish and seafood
- a flexitarian, or semi-vegetarian diet, includes eggs, dairy and honey and may include small amounts of meat, poultry, fish and seafood.
Are these diets healthy?
A 2023 review looked at the health effects of vegetarian and vegan diets from two types of study.
Observational studies followed people over the years to see how their diets were linked to their health. In these studies, eating a vegetarian diet was associated with a lower risk of developing cardiovascular disease (such as heart disease or a stroke), diabetes, hypertension (high blood pressure), dementia and cancer.
For example, in a study of 44,561 participants, the risk of heart disease was 32% lower in vegetarians than non-vegetarians after an average follow-up of nearly 12 years.
Further evidence came from randomised controlled trials. These instruct study participants to eat a specific diet for a specific period of time and monitor their health throughout. These studies showed eating a vegetarian or vegan diet led to reductions in weight, blood pressure, and levels of unhealthy cholesterol.
For example, one analysis combined data from seven randomised controlled trials. This so-called meta-analysis included data from 311 participants. It showed eating a vegetarian diet was associated with a systolic blood pressure (the first number in your blood pressure reading) an average 5 mmHg lower compared with non-vegetarian diets.
It seems vegetarian diets are more likely to be healthier, across a number of measures.
For example, a 2022 meta-analysis combined the results of several observational studies. It concluded a vegetarian diet, rather than vegan diet, was recommended to prevent heart disease.
There is also evidence vegans are more likely to have bone fractures than vegetarians. This could be partly due to a lower body-mass index and a lower intake of nutrients such as calcium, vitamin D and protein.
But it can be about more than just food
Many vegans, where possible, do not use products that directly or indirectly involve using animals.
So vegans would not wear leather, wool or silk clothing, for example. And they would not use soaps or candles made from beeswax, or use products tested on animals.
The motivation for following a vegan or vegetarian diet can vary from person to person. Common motivations include health, environmental, ethical, religious or economic reasons.
And for many people who follow a vegan or vegetarian diet, this forms a central part of their identity.
So, should I adopt a vegan or vegetarian diet?
If you are thinking about a vegan or vegetarian diet, here are some things to consider:
- eating more plant foods does not automatically mean you are eating a healthier diet. Hot chips, biscuits and soft drinks can all be vegan or vegetarian foods. And many plant-based alternatives, such as plant-based sausages, can be high in added salt
- meeting the nutrient intake targets for vitamin B12, iron, calcium, and iodine requires more careful planning while on a vegan or vegetarian diet. This is because meat, seafood and animal products are good sources of these vitamins and minerals
- eating a plant-based diet doesn’t necessarily mean excluding all meat and animal products. A healthy flexitarian diet prioritises eating more whole plant-foods, such as vegetables and beans, and less processed meat, such as bacon and sausages
- the Australian Dietary Guidelines recommend eating a wide variety of foods from the five food groups (fruit, vegetables, cereals, lean meat and/or their alternatives and reduced-fat dairy products and/or their alternatives). So if you are eating animal products, choose lean, reduced-fat meats and dairy products and limit processed meats.
Katherine Livingstone, NHMRC Emerging Leadership Fellow and Senior Research Fellow at the Institute for Physical Activity and Nutrition, Deakin University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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The Path to a Better Tuberculosis Vaccine Runs Through Montana
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A team of Montana researchers is playing a key role in the development of a more effective vaccine against tuberculosis, an infectious disease that has killed more people than any other.
The BCG (Bacille Calmette-Guérin) vaccine, created in 1921, remains the sole TB vaccine. While it is 40% to 80% effective in young children, its efficacy is very low in adolescents and adults, leading to a worldwide push to create a more powerful vaccine.
One effort is underway at the University of Montana Center for Translational Medicine. The center specializes in improving and creating vaccines by adding what are called novel adjuvants. An adjuvant is a substance included in the vaccine, such as fat molecules or aluminum salts, that enhances the immune response, and novel adjuvants are those that have not yet been used in humans. Scientists are finding that adjuvants make for stronger, more precise, and more durable immunity than antigens, which create antibodies, would alone.
Eliciting specific responses from the immune system and deepening and broadening the response with adjuvants is known as precision vaccination. “It’s not one-size-fits-all,” said Ofer Levy, a professor of pediatrics at Harvard University and the head of the Precision Vaccines Program at Boston Children’s Hospital. “A vaccine might work differently in a newborn versus an older adult and a middle-aged person.”
The ultimate precision vaccine, said Levy, would be lifelong protection from a disease with one jab. “A single-shot protection against influenza or a single-shot protection against covid, that would be the holy grail,” Levy said.
Jay Evans, the director of the University of Montana center and the chief scientific and strategy officer and a co-founder of Inimmune, a privately held biotechnology company in Missoula, said his team has been working on a TB vaccine for 15 years. The private-public partnership is developing vaccines and trying to improve existing vaccines, and he said it’s still five years off before the TB vaccine might be distributed widely.
It has not gone unnoticed at the center that this state-of-the-art vaccine research and production is located in a state that passed one of the nation’s most extreme anti-vaccination laws during the pandemic in 2021. The law prohibits businesses and governments from discriminating against people who aren’t vaccinated against covid-19 or other diseases, effectively banning both public and private employers from requiring workers to get vaccinated against covid or any other disease. A federal judge later ruled that the law cannot be enforced in health care settings, such as hospitals and doctors’ offices.
In mid-March, the Bill & Melinda Gates Medical Research Institute announced it had begun the third and final phase of clinical trials for the new vaccine in seven countries. The trials should take about five years to complete. Research and production are being done in several places, including at a manufacturing facility in Hamilton owned by GSK, a giant pharmaceutical company.
Known as the forgotten pandemic, TB kills up to 1.6 million people a year, mostly in impoverished areas in Asia and Africa, despite its being both preventable and treatable. The U.S. has seen an increase in tuberculosis over the past decade, especially with the influx of migrants, and the number of cases rose by 16% from 2022 to 2023. Tuberculosis is the leading cause of death among people living with HIV, whose risk of contracting a TB infection is 20 times as great as people without HIV.
“TB is a complex pathogen that has been with human beings for ages,” said Alemnew Dagnew, who heads the program for the new vaccine for the Gates Medical Research Institute. “Because it has been with human beings for many years, it has evolved and has a mechanism to escape the immune system. And the immunology of TB is not fully understood.”
The University of Montana Center for Translational Medicine and Inimmune together have 80 employees who specialize in researching a range of adjuvants to understand the specifics of immune responses to different substances. “You have to tailor it like tools in a toolbox towards the pathogen you are vaccinating against,” Evans said. “We have a whole library of adjuvant molecules and formulations.”
Vaccines are made more precise largely by using adjuvants. There are three basic types of natural adjuvants: aluminum salts; squalene, which is made from shark liver; and some kinds of saponins, which are fat molecules. It’s not fully understood how they stimulate the immune system. The center in Missoula has also created and patented a synthetic adjuvant, UM-1098, that drives a specific type of immune response and will be added to new vaccines.
One of the most promising molecules being used to juice up the immune system response to vaccines is a saponin molecule from the bark of the quillay tree, gathered in Chile from trees at least 10 years old. Such molecules were used by Novavax in its covid vaccine and by GSK in its widely used shingles vaccine, Shingrix. These molecules are also a key component in the new tuberculosis vaccine, known as the M72 vaccine.
But there is room for improvement.
“The vaccine shows 50% efficacy, which doesn’t sound like much, but basically there is no effective vaccine currently, so 50% is better than what’s out there,” Evans said. “We’re looking to take what we learned from that vaccine development with additional adjuvants to try and make it even better and move 50% to 80% or more.”
By contrast, measles vaccines are 95% effective.
According to Medscape, around 15 vaccine candidates are being developed to replace the BCG vaccine, and three of them are in phase 3 clinical trials.
One approach Evans’ center is researching to improve the new vaccine’s efficacy is taking a piece of the bacterium that causes TB, synthesizing it, and combining it with the adjuvant QS-21, made from the quillay tree. “It stimulates the immune system in a way that is specific to TB and it drives an immune response that is even closer to what we get from natural infections,” Evans said.
The University of Montana center is researching the treatment of several problems not commonly thought of as treatable with vaccines. They are entering the first phase of clinical trials for a vaccine for allergies, for instance, and first-phase trials for a cancer vaccine. And later this year, clinical trials will begin for vaccines to block the effects of opioids like heroin and fentanyl. The University of Montana received the largest grant in its history, $33 million, for anti-opioid vaccine research. It works by creating an antibody that binds with the drug in the bloodstream, which keeps it from entering the brain and creating the high.
For now, though, the eyes of health care experts around the world are on the trials for the new TB vaccines, which, if they are successful, could help save countless lives in the world’s poorest places.
KFF Health News is a national newsroom that produces in-depth journalism about health issues and is one of the core operating programs at KFF—an independent source of health policy research, polling, and journalism. Learn more about KFF.
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The SharpBrains Guide to Brain Fitness – by Alvaro Fernandez et al.
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We say “et al.” in the by-line, because this one has a flock of authors, including Dr. Pascale Michelon, Dr. Sandra Bond Chapman, Dr. Elkehon Goldberg, and various others if we include the foreword, introduction, etc.
This is relevant, because those who contributed to the meat of the book (i.e., those listed above), it makes the work a lot more scientifically reliable; one skilled science writer might make a mistake; it’s much less likely to make it through to publication when there are a bevy of doctors in the mix, each staking their reputation on the book’s content, and thus having a vested interest in checking each other’s work as well as their own.
As for what this multidisciplinary team have to offer? The book covers such things as:
- how the brain works (especially the possibilities of neuroplasticity), and what that means for such things as memory and attention
- being “a coach not a patient”; i.e., being active rather than passive in one’s approach to brain health
- the relevance of physical exercise, how much, and what kind
- the relevance (and limitations) of diet choices for brain health
- the relevance of such things as learning new languages and musical training
- the relevance of social engagement, and how some (but not all) social engagement can boost cognition
- methods for managing stress and building resilience to same (critical for maintaining a healthy brain)
- “cross-fit for your brain”, that is to say, a multi-vector collection of tools to explore, ranging from meditation to CBT to biofeedback and more.
The style is pop-science without being sensationalist, just communicating ideas clearly, with enough padding to feel casual, and not like a dense read. Importantly, it’s also practical and applicable too, which is something we always look for here.
Bottom line: if you’d like to be given a good overview of what things work (and how much they can be expected to work), along with a good framework to put that knowledge into practice, then this is a great book for you.
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The Alzheimer’s Gut-Brain Connection—Caught On X-Ray!
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We’ve written before about Alzheimer’s disease (a lot), and if you’re just joining us, then a great place to start is here:
How To Reduce Your Alzheimer’s Risk
We’ve also written about gut health (a lot), and if you’re just joining us, then a great place to start is here:
Make Friends With Your Gut! (Here’s Why & How)
And as a hat trick, yes, we’ve also written (admittedly not as much) about the gut-brain connection; here’s a primer:
The Brain-Gut Highway: A Two-Way Street
Because of how gut microbes influence brain function, behavior, and cognition, scientists wondered whether one’s microbiome might play a role in Alzheimer’s development. Recently, scientists from Italy’s Institute of Nanotechnology, working with the European Synchrotron Radiation Facility (ESRF), found some concrete answers:
How gut health affects Alzheimer’s
When the gut loses its healthy balance of bacteria, harmful bacteria (and fungi, like C. albicans, also popularly called by its first name, “Candida”) take the wheel. This problem (called “dysbiosis”) allows harmful microbes to produce toxic substances, leading to inflammation and weakening the protective barriers between the gut and brain.
In some cases, like the aforementioned C. albicans, they’ll even put roots through your gut wall (and interact with your nervous system, and they are a common reason for sugar and alcohol cravings—your CNS has literally been hacked by a fungal colony that wants sugar (including the sugar that occurs when alcohol is broken down—and that’s without considering the fact that alcohol also kills several of C. albicans competitors that rank amongst the “good bacteria”). Suffice it to say, the holes it puts in your gut wall aren’t great for the health either.
In any case, once the gut barrier is breached, it’s been hypothesized that harmful bacteria may even travel to the brain, triggering Alzheimer’s.
How the x-rays helped
To better understand gut changes in Alzheimer’s, scientists used a technique called nano- and micro- x-ray phase-contrast tomography (XPCT) at the aforementioned ESRF. That very fancy string of words refers to a commensurately powerful imaging method, which allows researchers to see detailed structures inside the gut without damaging tissue, or even adding contrast agents (like those unpleasant drinks that are sometimes required to be taken before soft-tissue x-rays).
The study examined gut samples from mice with Alzheimer’s (so yes, this does need to be repeated with humans, but in this case there’s no obvious reason why it shouldn’t be the same).
The scans revealed important changes in gut structures, including:
- The tiny finger-like villi and corresponding crypts in the gut lining
- Important cells* that help with digestion and protection
- Neurons involved in gut function
*e.g. Paneth cells, goblet cells, telocytes, and erythrocytes, all of whom would take more explanation than we have room for here, but suffice it to say they’re important to both digestion and correct mucus production (bearing in mind, mucus membranes are one of the main physical barriers to harmful bacteria—as humans, our conscious interactions with mucus are usually only the nuisance that occurs when we get a cold or something, but rest assured, mucus keeps us alive).
In short, all these findings suggest (we’d say “show”, but technically cause and effect have not been proven) gut health indeed plays a crucial role in Alzheimer’s disease pathogenesis and pathology (i.e., how the disease begins and progresses, respectively).
Why it matters
To quote Dr. Alessia Cedola,
❝This technique represents a real breakthrough for the thorough analysis of the gut, and it could be pivotal in early detection and prognosis of the disease.
By gaining a deeper understanding of these processes, we hope to identify new therapeutic targets and develop innovative treatments for this devastating disease.❞
In short: the technology can be used as a super-early diagnostic tool, and ultimately, improve prevention (by encouraging people to focus on gut health) as well as, hopefully, leading to new treatments, too.
Want to see it?
Here’s the paper itself, where there are also abundant very clear images:
Are you on top of your gut health already?
If not, do refer back to that first link we dropped about gut health, up top!
If you are already sure you’re looking after your gut and want to do something else to avoid Alzheimer’s coming to call, you might want to consider:
How To Clean Your Brain (Glymphatic Health Primer) ← your glymphatic system, something many people neglect, is the brain’s cleanup crew, and removes things like the beta-amyloid proteins that are implicated in Alzheimer’s pathogenesis. So, it’s worth knowing how to keep it in working order!
Take care!
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A Surprisingly Powerful Tool: Eye Movement Desensitization & Reprocessing
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Eye Movement Desensitization & Reprocessing (EMDR)
What skeletons are in your closet? As life goes on, most of accumulate bad experiences as well as good ones, to a greater or lesser degree. From clear cases of classic PTSD, to the widely underexamined many-headed beast that is C-PTSD*, our past does affect our present. Is there, then, any chance for our future being different?
*PTSD is typically associated with military veterans, for example, or sexual assault survivors. There was a clear, indisputable, Bad Thing™ that was experienced, and it left a psychological scar. When something happens to remind us of that—say, there are fireworks, or somebody touches us a certain way—it’ll trigger an immediate strong response of some kind.
These days the word “triggered” has been popularly misappropriated to mean any adverse emotional reaction, often to something trivial.
But, not all trauma is so clear. If PTSD refers to the result of that one time you were smashed with a sledgehammer, C-PTSD (Complex PTSD) refers to the result of having been hit with a rolled-up newspaper every few days for fifteen years, say.
This might have been…
- childhood emotional neglect
- a parent with a hair-trigger temper
- bullying at school
- extended financial hardship as a young adult
- “just” being told or shown all too often that your best was never good enough
- the persistent threat (real or imagined) of doom of some kind
- the often-reinforced idea that you might lose everything at any moment
If you’re reading this list and thinking “that’s just life though”, you might be in the estimated 1 in 5 people with (often undiagnosed) C-PTSD.
For more on C-PTSD, see our previous main feature:
So, what does eye movement have to do with this?
Eye Movement Desensitization & Reprocessing (EMDR) is a therapeutic technique whereby a traumatic experience (however small or large; it could be the memory of that one time you said something very regrettable, or it could be some horror we couldn’t describe here) is recalled, and then “detoothed” by doing a bit of neurological jiggery-pokery.
How the neurological jiggery-pokery works:
By engaging the brain in what’s called bilateral stimulation (which can be achieved in various ways, but a common one is moving the eyes rapidly from side to side, hence the name), the event can be re-processed, in much the same way that we do when dreaming, and relegated safely to the past.
This doesn’t mean you’ll forget the event; you’d need to do different exercises for that.
See also our previous main feature:
The Dark Side Of Memory (And How To Make Your Life Better)
That’s not the only aspect of EMDR, though…
EMDR is not just about recalling traumatic events while moving your eyes from side-to-side. What an easy fix that would be! There’s a little more to it.
The process also involves (ideally with the help of a trained professional) examining what other memories, thoughts, feelings, come to mind while doing that. Sometimes, a response we have today associated with, for example, a feeling of helplessness, or rage in conflict, or shame, or anything really, can be connected to previous instances of feeling the same thing. And, each of those events will reinforce—and be reinforced by—the others.
An example of this could be an adult who struggles with substance abuse (perhaps alcohol, say), using it as a crutch to avoid feelings of [insert static here; we don’t know what the feelings are because they’re being avoided], that were first created by, and gradually snowballed from, some adverse reaction to something they did long ago as a child, then reinforced at various times later in life, until finally this adult doesn’t know what to do, but they do know they must hide it at all costs, or suffer the adverse reaction again. Which obviously isn’t a way to actually overcome anything.
EMDR, therefore, seeks to not just “detooth” a singular traumatic memory, but rather, render harmless the whole thread of memories.
Needless to say, this kind of therapy can be quite an emotionally taxing experience, so again, we recommend trying it only under the guidance of a professional.
Is this an evidence-based approach?
Yes! It’s not without its controversy, but that’s how it is in the dog-eat-dog world of academia in general and perhaps psychotherapy in particular. To give a note to some of why it has some controversy, here’s a great freely-available paper that presents “both sides” (it’s more than two sides, really); the premises and claims, the criticisms, and explanations for why the criticisms aren’t necessarily actually problems—all by a wide variety of independent research teams:
Research on Eye Movement Desensitization & Reprocessing (EMDR) as a Treatment for PTSD
To give an idea of the breadth of applications for EMDR, and the evidence of the effectiveness of same, here are a few additional studies/reviews (there are many):
- An Eye Movement Desensitization and Reprocessing (EMDR) Group Intervention for Syrian Refugees With Post-traumatic Stress Symptoms: Results of a Randomized Controlled Trial
- Cognitive Behavioral Therapy vs. Eye Movement Desensitization and Reprocessing for Treating Panic Disorder: A Randomized Controlled Trial
- Eye movement desensitization and reprocessing (EMDR) therapy in the treatment of depression: a matched pairs study in an inpatient setting
- Emergency room intervention to prevent post concussion-like symptoms and post-traumatic stress disorder. A pilot randomized controlled study of a brief eye movement desensitization and reprocessing intervention versus reassurance or usual care
As for what the American Psychiatric Association says about it:
❝After assessing the 120 outcome studies pertaining to the focus areas, we conclude that for two of the areas (i.e., PTSD in children and adolescents and EMDR early interventions research) the strength of the evidence is rated at the highest level, whereas the other areas obtain the second highest level.❞
Source: The current status of EMDR therapy, specific target areas, and goals for the future
Want to learn more?
To learn a lot more than we could include here, check out the APA’s treatment guidelines (they are written in a fashion that is very accessible to a layperson):
APA | Eye Movement Desensitization and Reprocessing (EMDR) Therapy
Take care!
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Healing Arthritis – by Dr. Susan Blum
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We previously reviewed another book by this author, her Immune System Recovery Plan, and today it’s more specific: healing arthritis
Of course, not all arthritis is rooted in immune dysfunction, but a) all of it is made worse by immune dysfunction and b) rheumatoid arthritis, which is an autoimmune disease, affects 1% of the population.
This book tackles all kinds of arthritis, by focusing on addressing the underlying causes and treating those, and (whether it was the cause or not) reducing inflammation without medication, because that will always help.
The “3 steps” mentioned in the subtitle are three stages of a plan to improve the gut microbiome in such a way that it not only stops worsening your arthritis, but starts making it better.
The style here is on the hard end of pop-science, so if you want something more conversational/personable, then this won’t be so much for you, but if you just want the information and explanation, then this does it just fine, and it has frequent references to the science to back it up, with a reassuringly extensive bibliography.
Bottom line: if you have arthritis and want a book that will help you to get either symptom-free or as close to that as is possible from your current condition (bearing in mind that arthritis is generally degenerative), then this is a great book for that.
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Women Rowing North – by Dr. Mary Pipher
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Ageism is rife, as is misogyny. And those can be internalized too, and compounded as they intersect.
Clinical psychologist Dr. Mary Pipher, herself 75, writes for us a guidebook of, as the subtitle goes, “navigating life’s currents and flourishing as we age”.
The book does assume, by the way, that the reader is…
- a woman, and
- getting old (if not already old)
However, the lessons the book imparts are vital for women of any age, and valuable as a matter of insight and perspective for any reader.
Dr. Pipher takes us on a tour of aging as a woman, and what parts of it we can make our own, do things our way, and take what joy we can from it.
Nor is the book given to “toxic positivity” though—it also deals with themes of hardship, frustration, and loss.
When it comes to those elements, the book is… honest, human, and raw. But also, an exhortation to hope, beauty, and a carpe diem attitude.
Bottom line: this book is highly recommendable to anyone of any age; life is precious and can be short. And be we blessed with many long years, this book serves as a guide to making each one of them count.
Click here to check out Women Rowing North—it really is worth it
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